Methanolysis of Poly(ethylene-2,6-naphthalenedicarboxylate)

Jong-Han Chun; Jong-Soo Han; Sang Hern Kim

Journal of Industrial and Engineering Chemistry, Vol.4, No.2, 145-149, June, 1998

Jong-Han Chun, Jong-Soo Han¹, and Sang Hern Kim

Department o Chemical Technology, Taejon National University of Technology, Taejon 300-171, Korea
¹Agency for Defense Development, Taejon 305-600, Korea

Through the methanolysis of poly(ethylene-2,6-naphthalene dicarboxylate) (PEN), 2,6-dimethylna-phthalate (DMN) was obtained from the filtercake, small amounts of DMN and p-methoxycarbonyl-2-hydroxy-ethyl naphthalate (P-MCHEN) were obtained from the filtrate residue. To convert P-MCHEN to DMN, methanolysis was performed again under various conditions. With increasing amounts of MeOH and catalyst, the conversion of DMN to P-MCHEN increased. It was found that the recovery yield of DMN from PEN waste improved by using of zinc acetate as a second catalyst component which is capable of converting the by-product (P-MCHEN) formed in the methanolysis into DMN.

[References]

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[2] Cruz CS, J. Mater. Sci., 27, 2161 (1992)

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[4] Wang CS, Sun YM, J. Polym. Sci. A: Polym. Chem., 32(7), 1295 (1994)

[5] Baliga S, Wong WT, J. Polym. Sci. A: Polym. Chem., 27, 2071 (1989)

[6] Delattre J, U.S. Patent, 4,163,860 (1979)

[7] Datye KV, Raje HM, Sharma ND, Resources Conservation, 11, 117 (1984)

[8] Joshi KA, Naik GA, Nevrekar NB, J. Polym. Sci., 35, 1921 (1988)

[9] Marathe MN, U.K. Patent, GB2041916A (1979)

[10] Troev K, Todoroy K, Borisov G, J. Appl. Polym. Sci., 27, 3957 (1982)

[11] Vaidya UR, Nadkarni VM, J. Appl. Polym. Sci., 38, 1179 (1989)

[12] Millick WH, U.S. Patent, 4,284,760 (1981)

[13] Miyake H, Makimura O, Tsuchida T, U.S. Patent, 3,951,886 (1976)

[14] Vaidya UR, Nadkarni VM, Ind. Eng. Chem. Res., 26, 194 (1987)

[15] Vaidya UR, Nadkarni VM, J. Appl. Polym. Sci., 34, 235 (1987)